Range boiler union



Jan. 8, 1935. s, w. FORD RANGE BOILER UNION Filed July 1, 1931 INVENTOR Patented Jan. 8, 1935 UNITED STATES PATENT OFFIQE 1 Claim.

This invention relates to unions for connecting range boilers to the various service pipes and its principal object is to provide a union by which the several connections may be eifected more easily and quickly than is the case with the types of unions at present in use.

A further object is to provide a construction in which the effects of corrosion and consequent leakage are reduced to a minimum, and in which parts may be replaced quickly and economically and without any cutting of the piping.

Another object is to provide a union which is more economical to manufacture and which can be applied without the use of highly skilled labor and with no tools other than ordinary wrenches, such as those of the monkey and Stillson type.

With these and other objects in view the invention consists in the improved construction, arrangement, and combination of parts which will be hereinafter fully described, reference being had to the accompanying drawing which illustrates a preferred embodiment thereof, in which drawmg- Figure 1 is a part sectional view of a domestic hot water tank, commonly called a range boiler, showing the application of my improved union.

Figure 2 is a plan View of the same.

Figure 3 is an elevation and Figure 4 a vertical sectional view of my improved union drawn to an enlarged scale.

Figure 5 shows a detail part.

Like characters of reference designate corresponding parts throughout the drawing.

As shown in Figures 1 and 2 the boiler 1 is of usual construction having a crowned cover 2 to which are connected the cold water inlet 3 and hot water outlet 4. At 5 is the inlet from the heater and at 6 is the return pipe to the heater. At the bottom is the drain cock 7 of ordinary construction.

Referring now to Figures 3, 4 and 5 the body 8 of the union is formed with a flange 9 which fits against the wall of the boiler, and a concentric projection 10 which extends through the said wall and is welded thereto on the inside as shown at :r, or. On the upper end is screwed the regular union nut 11 which holds the flanged socket 12 in position to clamp the packing ring 13 between it and the body and ensure a water-tight joint. In the socket 12 is screwed the standard pipe 3, 4, 5 or 6, as the case may be.

In the interior of the body 8 is an internally threaded portion 81 into which is screwed a standard flush bushing 15 which is also internally threaded to receive the downward extension 31 of the inlet pipe 3, which is made to reach within a short distance of the bottom of the tank, in order to divert the incoming water thereto, as in the ordinary construction. In Figure 5 is shown a section of the flush bushing 15 taken at right angles to that in Figure 4, to show the lugs 151 for rotating the same. The bushing 15 is, of course, used only for connection of pipe 31 and is omitted at points 4, 5 and 6.

With the construction above described the removal and replacement of the inlet extension pipe 31 is rendered very easy as the said pipe may be inserted or removed from the outside of the boiler instead of from the inside as is necessary with the ordinary forms of construction, in which the pipe is screwed directly into the union and the union screwed directly into the wall of the boiler, or into a socket or spud welded to said wall.

This feature is of particular importance in the case of an old boiler requiring a new pipe, since in the ordinary construction corrosion of the parts makes it impossible to remove them without damage to the boiler. Also by reason of the union body 8 being welded to the boiler Wall, the usual excessive corrosion at the point where a threaded part is screwed into the boiler wall is avoided.

In unions of the ordinary type which are screwed directly into the boiler wall, considerable work is necessary to trim or line up the connecting pipes, also the strain necessary to obtain a tight joint frequently causes damage to the parts, whereas by using my improved union the installation, removal and replacement is effected in an easy manner without cutting of pipes.

A boiler equipped with my improved union may, after insertion of the pipe extension 31, be set directly upon the stand and all pipes connected or disconnected with an ordinary wrench and Without movement or displacement of the boiler. Further, no particular skill is required to accomplish the work.

Having described my said invention, what I claim as new and desire to secure by Letters Patent of the United States, is:

A range boiler union comprising a body having detachable union means outside thereof and having an internally threaded bore therewithin terminating in an enlarged, smooth-bored mouth adjoining said union means, a bushing screwed into said bore provided with wrench means projecting into said mouth and With internal screw threads, and a pipe having its upper end screwed into said bushing and its lower end extending freely into the boiler.

SAMUEL W. FORD. 

